Review of Martha Marcy May Marlene

OK this movie did have it's highlights. Elizabeth Olsen was great in it, and as a matter of fast so was all of the acting. But the story and ending were frustrating beyond belief. Why was Martha unable to tell her sister she had been in a cult? It had only been 2 years and she clearly was in touch enough to remember life before the cult (asking about the aunt). I think the story tried to portray their relationship as too dysfunctional for her to be able to, but the story failed. If I had someone who even remotely cared about me and I had been in that situation I would spill the beans and try to nail those murderous b-tards! I checked the "spoiler" box only because am I the only one that didn't get the ending? She is apparently being taken to therapy/asylum and someone is following them and Blam! The End! I ask pray tell, why Hollywood sees fit to end movies with the audience hanging and wondering WTF? It's not fun, not "artsy", and only makes us ask. How can I get back the 90 minutes of my life? I gave this movie a 5 but only for acting. The plot and story get a 0 or 1.